| 摘要 |
PURPOSE:To realize favorable mixing of thickner with concrete even with a truck agitator by a method wherein green concrete, which is produced in a ready mixed concrete plant, is placed in a truck agitator, which is rotated after the mixed powder of powdered thickener and powdered dispersion agent is charged in the green concrete. CONSTITUTION:Ready mixed concrete 2, which is produced in a ready mixed concrete plant 1, is charged in a truck 4 with an agitator 3. On the other hand, powdered dispersion agent 6 and thickener 7 are mixed with each other by a mixer 5. The resultant mixed powder 8 is charged in the agitator 3 and mixed by changing-over the agitator 3 to high speed rotation. The mixed powder 8 is preferably charged in the truck agitator 3, which has arrived at the placement site of the concrete. Thus, the placement can be carried out just after the kneading, resulting in allowing to improve the characteristics of the concrete. |
